Findstar: processing Error Cannot perform star matching:

when I ran the script, I got the following error. Any idea? I am using the latest siril. 99.8.1

14:03:46: Cannot perform star matching: try #3. Image 5 skipped
14:03:46: Found 29 stars in image 4, channel #1
14:03:46: Cannot perform star matching: try #3. Image 4 skipped
14:03:46: Found 254 stars in image 3, channel #1
14:03:46: Cannot perform star matching: try #3. Image 3 skipped
14:03:46: Found 230 stars in image 2, channel #1
14:03:46: Cannot perform star matching: try #3. Image 2 skipped

Please see https://siril.org/faq/#why-doesnt-registration-find-stars-in-my-images

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Thank you. I loaded each image and did that Dynamic PSF and I could see stars detected. I lowered it to 8 radius and I am ale to proceed but I still this error in the log. Not sure what to do

13:50:46: Reading FITS: file pp_light_00005.fit, 3 layer(s), 3008x3008 pixels
13:50:46: Findstar: processing…
13:50:47: Saving FITS: file r_pp_light_00001.fit, 3 layer(s), 3008x3008 pixels
13:50:47: Reading FITS: file pp_light_00002.fit, 3 layer(s), 3008x3008 pixels
13:50:47: Findstar: processing…
13:50:47: Found 242 stars in image 3, channel #1
13:50:47: Cannot perform star matching: try #3. Image 3 skipped
13:50:47: Found 26 stars in image 5, channel #1
13:50:47: Cannot perform star matching: try #3. Image 5 skipped
13:50:47: Found 17 stars in image 4, channel #1
13:50:47: Cannot perform star matching: try #3. Image 4 skipped
13:50:48: Found 198 stars in image 2, channel #1
13:50:48: Matching stars in image 2: done

Which image it is complaining? Is it the one pp_light_0000… or original image? I opened both original and PP_xxxxx.

Or something wrong with darks? Please give me some idea to identify and fix this.

This is not a good idea to change this parameter.

ok. how do I know what is wrong with those images? All of them taken in the same session. I am not sure what is wrong in the ones it is complaining. if know, at least next imaging session I can take care. any idea?

Without seeing images. It is difficult to say. Try to play with the threshold.